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Why does Na2CO3 solution turn into a sus...

Why does `Na_2CO_3` solution turn into a suspension, when saturated with `CO_2` gas ?

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Sodium bicarbonate is sparingly soluble in water due to polymerisation of bicarbonate ions through hydrogen bonds. When `CO_2` is passed into sodium carbonate it converts into less soluble bicarbonate. So a suspension of sodium bicarbonate forms.
`Na_2CO_3+H_2O+CO_2 to 2Na HCO_3`
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